We had honestly not heard of asphalt (normally used to pave roads) being utilized as a sound deadening material, let alone by luxury automakers. However, the Administrative Center for Defective Products of China (DPAC) has announced that it will be launching an investigation into the use of the material by Audi, Mercedes-Benz and BMW.
It's actually not the manufacturers directly, but rather their Chinese joint-ventures (Beijing-Benz, Brilliance-BMW and FAW-VW).
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